<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
    .container{
      height: 100%;
      width: 100%;
    }
    .center{
      display: table-cell;
      vertical-align: middle;
    }
    .center_cell{

    }
    .login_con{
      width: 400px;
      height: 300px;
      background-color: aqua;
      margin: 0 auto;
      width:300px;
      height: 400px;
    }
  </style>
</head>
<body>
<div class="container">
  <div class="center">
    <div class="login_con">
      <div>logo</div>
      <div><Input  placeholder="用户名" style="width: 300px"></Input></div>
      <div><Input  placeholder="密码" style="width: 300px"></Input></div>
      <div><Button>登录</Button><Button>注册</Button></div>
    </div>
    <div class="center_cell"><span>Power By JLCS Copyright@2017 All rights Reserved</span></div>
  </div>
</div>
</body>
</html>
